Sobo SB Series Single Outlet Aquarium Battery Air Pump, Rechargeable and Portable, Large Battery Capacity for Aquariums, Outdoor, Fishing and Power Cut (SB-218)

1. It should be charged for 6-8 hours for the first use. The charging is automatically turned off when fully charged. 2. Adopt the latest ultra-low power consumption to shut down and automatically sleep for 5 seconds and electronic circuits to effectively extend the battery standby time and life. Click the button to wake up from sleep mode and enter normal work. (Note: In sleep mode, it will automatically enter sleep mode again after being awakened for 5 seconds even if it encounters strong interference. And in sleep mode, it can still charge normally and indicate the battery level, and stop charging when fully charged.) 3. In DC continuous or intermittent mode, plug in the charger (available charging head, mobile power, car USB power supply, etc.), it will automatically switch to AC power mode (Keep the original continuous or intermittent mode), the AC (red) light will be on and it will be charged automatically (same as the description in item 1). Automatically switch to DC working mode after a power failure (Maintain the original continuous or intermittent mode), the AC (red) light goes out. 4. Emergency start mode: When the charger is manually shut down after the charger is plugged in (or the charger is plugged in after the manual shut down), in case of power failure, the machine will automatically start in continuous mode. After charging, it will automatically shut down under-voltage protection. When the mains power is restored, it will start again in continuous mode and automatically charge.